薄壁圆钢管的节点力学性能研究

RESEARCH ON MECHANICAL PROPERTIES OF THIN-WALLED CIRCULAR STEEL TUBE JOINTS

对薄壁圆钢管节点力学性能展开研究,通过受压试验对薄壁圆钢管受力过程进行分析,得出其受力变形分为弹性形变、屈服阶段、突变阶段,决定薄壁圆钢管结构性能的关键因素在于其节点。进行薄壁圆钢管T型构件板接节点受拉承载作用研究并进行试验对比,轴拉荷载作用下剪切应力分布均匀,板接节点的荷载偏心距对受弯承载力有重大影响,点板厚度和主管直径对其承受荷载能力影响不大,在此基础上得出其工程应用的一般计算式。

The paper focused on the mechanical properties of thin-walled steel tubular joints. The loading process of thin-walled circular steel tubes was determined and analyzed through compression tests, and the deformation could be divided into elastic deformation, yielding stage and mutation stage. The analysis results showed that the joint was the key factor influencing the performance of thin-walled steel tubular. The bearing capacity of thin-walled circular steel tube with T-joint plates under tension was studied and compared by tests. The results showed that the shear stress distribution was uniform under axial tensile load, and the load eccentricity of plate joints had great influence on bending capacity, the plate thickness and the diameter of the main pipe had little effect on the bearing capacity. A general formula for the engineering application was derived.